147 years old now in 2021 - what year born?


Today, 27 November 2021 if a person is 147 years old now, what year was he born? See below:


If 147 years old, year of birth is:
1873 or 1874*
*It depends on whether he was born before or after 1 January 1874.


If now 147 years and his year of birth 1873 if he was born after 27 November 1873 until 31 december 1873 inclusively, and his year of birth is 1874 if he was born from 1 January 1874 to 27 November 1874.


Other examples:

If now 10 years, year of birth 2010 or 2011
If now 15 years, year of birth 2005 or 2006
If now 29 years, year of birth 1991 or 1992
If now 88 years, year of birth 1932 or 1933

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